Polar bears : proceedings of the third Working Meeting of the Polar Bear Specialist Group, organized by the Survival Service Commission of IUCN, 7-10 February 1972, at Morges, Switzerland
Complete Title:
Polar bears : proceedings of the third Working Meeting of the Polar Bear Specialist Group, organized by the Survival Service Commission of IUCN, 7-10 February 1972, at Morges, Switzerland